% 中文摘要
\newpage
\renewenvironment{abstract}
{
	\begin{center}
		\heiti \zihao{3} \setlength{\baselineskip}{20pt}{摘\qquad 要}
		\vspace{1em}
	\end{center}
}

\clearpage

\begin{abstract}

	\setlength{\baselineskip}{20pt} \songti \zihao{-4} \chinesemainabstract

	\vspace{0.5em}

	\noindent{{\heiti \zihao{4} 关键词：}{\songti \zihao{-4} \keywordsone \quad \keywordstwo \quad \keywordsthree  \quad \keywordsfour \quad \keywordsfive}}

\end{abstract}